1/*
2 * Copyright (C) 2014, 2016 Apple Inc. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 * 1. Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
24 */
25
26#include "config.h"
27#include "ExceptionFuzz.h"
28
29#include "Error.h"
30#include "JSCInlines.h"
31#include "TestRunnerUtils.h"
32
33namespace JSC {
34
35static unsigned s_numberOfExceptionFuzzChecks;
36unsigned numberOfExceptionFuzzChecks() { return s_numberOfExceptionFuzzChecks; }
37
38// Call this only if you know that exception fuzzing is enabled.
39void doExceptionFuzzing(ExecState* exec, ThrowScope& scope, const char* where, const void* returnPC)
40{
41 VM& vm = scope.vm();
42 ASSERT(Options::useExceptionFuzz());
43
44 DeferGCForAWhile deferGC(vm.heap);
45
46 s_numberOfExceptionFuzzChecks++;
47
48 unsigned fireTarget = Options::fireExceptionFuzzAt();
49 if (fireTarget == s_numberOfExceptionFuzzChecks) {
50 printf("JSC EXCEPTION FUZZ: Throwing fuzz exception with call frame %p, seen in %s and return address %p.\n", exec, where, returnPC);
51 fflush(stdout);
52
53 // The ThrowScope also checks for unchecked simulated exceptions before throwing a
54 // new exception. This ensures that we don't quietly overwrite a pending exception
55 // (which should never happen with the only exception being to rethrow the same
56 // exception). However, ExceptionFuzz works by intentionally throwing its own exception
57 // even when one may already exist. This is ok for ExceptionFuzz testing, but we need
58 // to placate the exception check verifier here.
59 EXCEPTION_ASSERT(scope.exception() || !scope.exception());
60
61 throwException(exec, scope, createError(exec, "Exception Fuzz"_s));
62 }
63}
64
65} // namespace JSC
66
67
68